Designed to plug into an iPhone, the tiny device called a Tinke can give you a snapshot of your respiratory rate, blood oxygen levels and heart rate.

Written by

Deborah Porterfield , Special for USA TODAY

Device monitors health

Feeling good? See if the Tinke agrees with your assessment. Designed to plug into an iPhone, the tiny device can give you a snapshot of your respiratory rate, blood oxygen levels and heart rate.

Here's how: Pop the device into your iPhone (or an iPad or iPod Touch), choose a health index from the included app and place your thumb over the device's sensor. If you opt for the Vita index, the device will record your heart rate, respiratory rate and blood oxygen levels and then use these results to gauge your level of fitness. ...